Clearly they value these employees and want them to be happy. I would guess that if the janitorial staff tried this there would a)be a lot less press about it a

Clearly they value these employees and want them to be happy. I would guess that if the janitorial staff tried this there would a)be a lot less press about it and b) google wouldn't put up with it nearly as well. They also might have contracts with these people that require certain reasons for it. Certainly it would be very bad press for google if they fired all of the people who are involved in this.